<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        html, body {
            width: 100%;
            height: 100%;
            margin: 0;
            padding: 0;
            background: #060e1b;
        }

        canvas {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
        }
    </style>
</head>
<body>
<canvas id="canvas"></canvas>
<script>
    "use strict";

    var canvas = document.getElementById('canvas'),
      ctx = canvas.getContext('2d'),
      w = canvas.width = window.innerWidth,
      h = canvas.height = window.innerHeight,

      hue = 217,
      stars = [],
      count = 0,
      maxStars = 1400;

    var canvas2 = document.createElement('canvas'),
      ctx2 = canvas2.getContext('2d');
    canvas2.width = 100;
    canvas2.height = 100;

    var half = canvas2.width/2,
      gradient2 = ctx2.createRadialGradient(half, half, 0, half, half, half);
    gradient2.addColorStop(0.025, '#fff');
    gradient2.addColorStop(0.1, 'hsl(' + hue + ', 61%, 33%)');
    gradient2.addColorStop(0.25, 'hsl(' + hue + ', 64%, 6%)');
    gradient2.addColorStop(1, 'transparent');

    ctx2.fillStyle = gradient2;
    ctx2.beginPath();
    ctx2.arc(half, half, half, 0, Math.PI * 2);
    ctx2.fill();

    var l1 = [] ,l2=[];
    function random(min, max) {
        if (arguments.length < 2) {
            max = min;
            min = 0;
        }

        if (min > max) {
            var hold = max;
            max = min;
            min = hold;
        }

        return Math.floor(Math.random() * (max - min + 1)) + min;
    }

    var star = function(){
        this.orbitRadius = random(w / 2 - 50);
        this.radius = random(100, this.orbitRadius) / 10;
        this.orbitX = w / 2;
        this.orbitY = h / 2;
        this.timePassed = random(0, maxStars);
        this.speed = random(this.orbitRadius) / 900000;
        this.alpha = random(2, 10) / 10;

        count ++;
        stars[count] = this;
    }

    star.prototype.draw = function(){
        var x = Math.sin(this.timePassed +1) * this.orbitRadius + this.orbitX,
          y = Math.cos(this.timePassed ) * this.orbitRadius/2 + this.orbitY,
          twinkle = random(10);


        l1.push(Math.sin(this.timePassed +1))
        l2.push(Math.sin(this.timePassed) )
        // console.log(this.timePassed % ( 2 * Math.PI) / ( 2* Math.PI) * 360)
        console.log(this.timePassed);
        if(twinkle === 1 && this.alpha > 0){
            this.alpha -= 0.05;
        }else if(twinkle === 2 && this.alpha < 1){
            this.alpha += 0.05;
        }

        ctx.globalAlpha = this.alpha;
        ctx.drawImage(canvas2 , x - this.radius / 2 , y - this.radius / 2, this.radius, this.radius);
        this.timePassed += this.speed;
    }

    for (var i = 0; i < maxStars; i++) {
        new star();
    }

    stars.forEach(function(star,index){
        if(index < 1000)
        star.draw();
    })

    console.log(l1,l2);
</script>
</body>
</html>